American Farmland Trust
- Working to stop the loss of productive farmland and promote healthier farming practices in the U.S.

Ecological Farming May Cause More Heavy Metals In The Soil
- Some systems of ecological arable farming which use only organic fertilisers contaminate the soil with levels of cadmium, copper and lead which are twice as high as when a combination of both animal manure and artificial fertiliser is used.
(February 10, 1999)